Sewing machine



FIG. 1 is a front elevational view of a sewing machine, showing my new design;

FIG. 2 is a right side elevational view of the sewing machine of FIG. 1;

FIG. 3 is a back elevational view of the sewing machine of FIG. 1;

FIG. 4 is a left side elevational view of the sewing machine of FIG. 1;

FIG. 5 is a top plan view of the sewing machine of FIG. 1;

FIG. 6 is a front perspective view of the sewing machine of FIG. 1;

FIG. 7 is a back perspective view of the sewing machine of FIG. 1. 

The ornamental design for a sewing machine, as shown and described. 